When I first started out, I'd occasionally fill the buffer, but I learned some shutter discipline and it hasn't been a problem since.

I really need to upgrade my second D3 to D3S, but I'm on the fence about waiting for the D4 (D-next?). Ideally, I'd have two D3S bodies and and a third (maybe D3 / D7000) as a spare for the dog sports work.

For the studio, I'd love a D3X, but the budget for it just isn't there right now.